Originally Posted by Kekoa_50
Not the stock exhaust. No baffles in them either.
Information that would have been helpful in your first post.
An exhaust valve not seating properly would cause a compression leak issue with associated performance issue....not a whisteling noise........
Whisteling noises are causes by exhuast gasket leaks, wind, rushing air past something.......or a baffle with a tweaked fin.
Since you have no baffles..... how can you hear a whisteling noise, over extremely loud pipes?
Helmet straps whistle in the wind.......